Scripting question

[einfrnirdyr]

Tutorials for this stuff..? Yes please!

Such an endeavour would be greatly appreciated.

Especially if such tutorials were accompanied by simple sample maps and scripts that aren't overwhelmed with detail and are straight to the point. Say, for example, a simple box map containing just a locked door and a key; accompanied with a script that demonstrates how the key is picked up and placed into the inventory and then used to open the door.